It should be expected that the price of bitcoin be unstable in it's early years. The same is true for most other currencies. It you were to look at a longer term graph, you would see even more instability.
Over a much longer term the price of bitcoin will likely eventually 'settle down' to more normalized levels (be it either higher or lower where it stands now) as more adoption will likely cause the price to stabilize
Good answer , I agree . It will have great fluctuations in the beginning years. It has only been here for 5 years . It might also have instability for more years to come . But stay strong and dont give up on bitcoin . Be strong willed . it will benefit you much more than you think.